[S] Change in flashrom[master]: libflashrom: Fix flashrom_programmer_init()

[Edward O'Callaghan (Code Review)]

Edward O'Callaghan has uploaded this change for review. ( https://review.coreboot.org/c/flashrom/+/67360 )

Change subject: libflashrom: Fix flashrom_programmer_init()
......................................................................

libflashrom: Fix flashrom_programmer_init()

Change-Id: Ibd61333c0f74086186a0f2f1f2c9cf780364f9d6
Signed-off-by: Edward O'Callaghan 
---
M flashrom.c
M libflashrom.c
2 files changed, 32 insertions(+), 8 deletions(-)

git pull ssh://review.coreboot.org:29418/flashrom refs/changes/60/67360/1

diff --git a/flashrom.c b/flashrom.c
index ba363b2..4706d89 100644
--- a/flashrom.c
+++ b/flashrom.c
@@ -146,8 +146,8 @@
    programmer_may_write = 1;

programmer_param = param;
-	msg_pdbg("Initializing %s programmer\n", programmer->name);
-	ret = programmer->init();
+	msg_pdbg("Initializing %s programmer\n", prog->name);
+	ret = prog->init();
    if (programmer_param && strlen(programmer_param)) {
    	if (ret != 0) {
    		/* It is quite possible that any unhandled programmer parameter would have been valid,
diff --git a/libflashrom.c b/libflashrom.c
index 3e28938..2febf30 100644
--- a/libflashrom.c
+++ b/libflashrom.c
@@ -29,6 +29,10 @@
 #include "writeprotect.h"

+struct flashrom_programmer {
+	struct programmer_entry prog; /* the programmer_entry must be the first field! */
+};
+
 /** Pointer to log callback function. */
 static flashrom_log_callback *global_log_callback = NULL;

@@ -193,18 +197,28 @@
 int flashrom_programmer_init(struct flashrom_programmer **const flashprog,
    		     const char *const prog_name, const char *const prog_param)
 {
-	unsigned prog;
+	unsigned prog_idx;

-	for (prog = 0; prog < programmer_table_size; prog++) {
-		if (strcmp(prog_name, programmer_table[prog]->name) == 0)
+	for (prog_idx = 0; prog_idx < programmer_table_size; prog_idx++) {
+		if (strcmp(prog_name, programmer_table[prog_idx]->name) == 0)
    		break;
    }
-	if (prog >= programmer_table_size) {
-		msg_ginfo("Error: Unknown programmer "%s". Valid choices are:\n", prog_name);
+	if (prog_idx >= programmer_table_size) {
+		msg_gerr("%s: Error: Unknown programmer "%s". Valid choices are:\n", __func__, prog_name);
    	list_programmers_linebreak(0, 80, 0);
    	return 1;
    }
-	return programmer_init(programmer_table[prog], prog_param);
+
+	if (!flashprog) {
+		msg_gerr("%s: call site did not allocate a valid flashrom_programmer entry!\n", __func__);
+		return -2; /* no valid flashrom_programmer allocated. */
+	}
+
+	/* Take a mutable copy out of the table of available programmers. */
+	struct programmer_entry *pentry = &((*flashprog)->prog);
+	memcpy(pentry, programmer_table[prog_idx], sizeof(struct programmer_entry));
+
+	return programmer_init(pentry, prog_param);
 }

int flashrom_programmer_shutdown(struct flashrom_programmer *const flashprog)